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x in (-oo:+oo)
x/7.4 = 3.8 // - 3.8
x/7.4-3.8 = 0
0.13513514*x-3.8 = 0 // + 3.8
0.13513514*x = 3.8 // : 0.13513514
x = 3.8/0.13513514
x = 28.11999899
x = 28.11999899
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